886 



EXPERIMENT STATION RECORD. 



[Vol. 37 



used and a li.st of formulas used in computing are also given, together with a 

 list of publications and papers dealing with the mechanical properties of timber. 



The seasoning of wood, H. S. BErrs (U. .S. Drpt. Agr. linl. 552 (Wll), pp. 

 28, pis. 8, figs. 18). — Thi.s bulletin enumerates the injuries to wood in seasoning, 

 as checking, casehardening. honey-combing, warping, and collapse, and describes 

 the processes of air seasoning and kiln-drying. Tabular and graphic data are 

 given on the average weights and shrinkages of various species of wood and 

 the rate at which crossties, poles, and sawed timbers of several species lose 

 moisture when freely exposed to the atmosphere. 



CreoHoting for estate purposes, W. P. GuiJiNFiELD (Quart. Jour. Forestry, 11 

 {1917), No. 2, pp. 9.'f-lll). — The u.se of creosote as a preservative for fartu 

 and estate structural timber is discussed. 



[Farm machinery directory] {Fajin Machinery. No. IS. '(2 {1917), pp. 20- 

 2Jf). — This directory lists the specifications for 188 internal-combustion tractors, 

 129 plows for tractor use, 23 buskers and shredders, and 104 silo fillers. 



Public tests of motor cultivation at Avignon, E. Zachaiif.wicz {Prog. Agr. 

 et Vit. {I'.'l. rnst-Cniirc), .17 {1916), No. 31. pp. 109-115).— Te^ta of six trac- 

 tors on breaking and deep plowing of loose alluvial soil are reportetl. The 

 soil was dry and rather tenacious. The following table gives the results on 

 breaking : 



Test* on soil brcahing. 



The following table gives the results on deep plowing: 

 Tests on deep plowing. 



Tractor specifications, 1917 {N. O. E. A. Bui, 2 {1917), No. 10, pp. 2J, ; aha. 

 in Gas Engine, 19 {1917), No. 6, p. 278). — Detailed specifications for 95 different 

 tractors are given. 



Note on fencing construction, T. Git-Rkst {Dept. Agr. Botnbajj Bui. 81 

 {1916), pp. 3, pis. 8). — Tills bulletin describes briefly a few practical points to 

 be observed when erecting wire fences with wooden posts, with special reference 

 to conditions in India. 



Dairy and general-purpose barns, F. M. White {Nat. Lumber Manfrs. Assoc, 

 Trade Ext. Dept. Farm Bui. 7 {1917), pp. 40, figs. S/).— This bulletin deals with 

 site and location, general shapes, light, ventilation, stalls, floors, and feed alleys 



